TORK SA170 15 Amp Zip-Set Digital Wall Switch Timer 15 Amp zip-set digital wall switch timer automatically turns on lights at sunset; auto-adjusts for seasonal time changes Zip-set systems allows timer to be programmed simply by entering ZIP code Provides battery back-up to maintain settings during power failure Includes random settings for added security and 7-5-2 setting for full weeks, weekdays, or weekends 1 Year warranty